Beignet-Meshchersky Sign

The Besnier-Meshchersky sign, also known as Besnier's sign, is one of the diagnostic signs for detecting syphilis. This sign was described by the French dermatologist E. Besnier and the Soviet dermatovenerologist G. I. Meshchersky in the 1800s.

The Besnier-Meshchersky sign is that with syphilis a red spot appears on the skin, which quickly spreads, forming an erythematous plaque-like element with clear boundaries. This sign can occur anywhere on the body, including the face, neck, chest, abdomen, and limbs.

The main cause of the Besnier-Meshchersky sign is infection of the body with Treponema pallidum, which causes syphilis. The infection penetrates the skin through microcracks and damage, causing inflammation and the formation of a red spot.

To diagnose syphilis, the doctor must examine the patient and pay attention to the presence of the Besnier-Meshchersky sign. Other diagnostic tests, such as a blood test for treponemal antibodies or serological tests, may also be used.

It is important to note that the Besnier-Meshchersky sign is not the only sign of syphilis, and the diagnosis can only be confirmed after additional tests and analyses.

The Besnier-Meshchersky sign is a morphological skin criterion for lichen planus, which consists of multiple flat and slightly raised grayish-white plaques with a diameter of 0.3–2 cm with a smooth or finely lumpy surface, retaining a tendency to peripheral growth. Multiple, unilaterally distributed